Arc-welding machine



I 1,628,148 May 10 1927- c. HUBBLE ARC WELDING MACHINE Filed March 20.1926 I5 Sheets-Sheet 1 gramamuta r aw Qtto: wag

1 1927. May 0 G. c. HUBBLE ARC WELDING MACHINE 3 Sheets-Sheet 2 FiledMarch 20, l925 Grover Add-Lia W 611' new I I 1,628,148 May 1927' I 5. c.HUBBLE ARC WELDI NG MACHINE juvenkw Patented May 10, 1927 UNITED STATESPATENT OFFICE.

ARC-WELDING rmemcrm.

' Application filed March 20, 1926. Serial No. 96,324.

.l.his invention relates to arc welding inachines of the type describedand claimed in my co-pendin application Serial No. 61,106, filedOctober? 1925. 1

5 It is essential in welding operations tha the welder should give atall times-careful attention to the work or parent metal to prevent notonly burning the metal of the work but to'prevent the intensely heatedwelding electrode from burning through thin porpipes, gasoline. tanksand other articles formed of relatively thin metal.

In order to strike an arc to initiate welding for producing a sound weldit is neces- .sary to employ a larger amperage particularly when thework or parent metal is cold than a few seconds after the arc has beenstruck for then the temperature of the work is ata maximum and continuedapplication of the welding electrode at this time will result in burningof the work. To avoid this the operator finds. it necessary to break theare and wait until the work has cooled sutficiently to permitcontinuance of the operation. r i It has been proposed to construct arewelding machines which will provide, when the arc is struck, a fixedamperage which is regulated by some well-known electrical means embodiedin a welding machine. Due to the fact that the machine isremotelylocated "from the work and likewise the operator it isneeessaryfor the welder to break the arc andreturn to the machine in order toactuate the electrical means for controlling the amperage in an attemptto regulate,- in an approximate manner, the temperature for con tinuingthe welding operation. This method of regulation requires frequent tripsto the welding machine in View of the varying conditions met with in.the work. ,It is therefore highly important that the control of theamperage to determine the required temperature at all times be in thehands of thewelder for effective weldingu nder all conditions.

It is an object of the present invention to provide a device effectivefor welding under all conditions whereby the amperage may be controlledat the will of the welder and at a point which may be reniote fromthemachine but which isconvenient to the work tions of the work as in casesof welding flume so that the-welder will not be required to breakthe-arc and return to the machine for an adjustment of the controls;

I Another object of the invention is the pros vision of a device for arcwelding in which thb control of the amperage and therefore theregulation of the temperature at the terminals of the arc is directlyand conveniently, 111 thehands oi the operator, and m which device isIncluded a reactance and a movable core adjustable relative to thereactance' and thus not only increasing the efliciency ot-the are butproviding for a deeper penetration of the weld, the arrangement of thecoils 1 .being such that one coil will have an opposite polarity to anadjacent coil.

Another object of the invention is the provision of a reactance disposedbetween both terminals of an arcand the poles of an alternating currentsupply for stabilizing the flow of current across the are with meansoperated remotely from the reactance for controlling at will the amountof amperage at the are. I This invention will be best understood fromthe followingdetailed description in view of the accompanying drawings,al-'- though it is to be understood that the invention is not to beconfined to the disclosure, being susceptible of modifications whichinvolve no material departure from the important features of theinvention asset forth in the claims. 1

In the drawings:

Figure 1 is a view in perspective of an arc welding machine constructedin accord ance with the principles of my invention,

withthecover plates removed.

Figure-2 is a View 1n perspective of the" arc welding machine.

Figure 3 is a fragmentary longitudinal section along the line 33 ofFigure 1. Figure 4 is a horizontal section taken along the line 4-4 ofFigure 1.

Figure 5 is a wiring'diagram of the entire circuit of the device.

Referring more particularly to the drawings, designates a base memberwhich has a central opening as shown at 11 for the purpose oflesseningthe weight of the de-'-' vice and the base member is preferably made offour rectangular pieces of fiat metal secured together at their oppositeends. The base member, at its periphery, isprovided with an upstandingflange 12 which receives at the four corners of the base member angleiron uprights 13. .These uprights are secured in any approved manner tothe flange 11 and the base member 10. A metal endless strap 14 issecured to the outer faces of the uprights 13 adjacent their upper ends.

Upon opposite sides of the device and connected to a pair of theuprights is a handle 15 which is spaced from the cover plates 16 so thatthe same may be convenientlygrasped I by the hand for carrying the arcwelding machine; It will be noted that two of the side plates 16 areshown in position in Figure '1, while the other twoplates have beenremoved to permit an interior view 'of the important operating elementsof the machine.

Four. coils 17, 18, 19 and 20 are enclosed within the main supportingshell. Each of the coils is formed on a cylinder 21 of insulatingmaterial. A pair of cylinders rest at their lower ends upon a support 22which is formed of a bar of suitable metal bent at its ends to receivethe lower ends of a pair of the shells, with bracket arms 23 havingtheir upper ends connected to the bent portions of the bars 22 and feet24at their lower ends secured in any approved manner 'to the-base member10.

a pair of the curved members at opposite sides of-the cylinders." Thesupporting structure just described for the upper end of the cylindersis "preferably cast' integrally.

Straps 29. are connected at'their upper'ends to the reinforcing bars 28,with the lower ends 'ofthe straps being connected to the supporting bars22 located adjacent the lower end ofthe coils.

A rod 30 connected to the upper end of an upright 13 extends diagonallyinwardly and has its inner end secured to the outer "face of a curvedmember 25 whereby the supporting structures for the upper ends of thecoils are held against movement.

Movable longitudinally of each cylinder 21 is a core 31. A pair of thecores are con- -nected together by a bridging member 32 and saidbridging members are rigidly connected together by means of rods 33.These rods are located at right angles to the bridging members 32.

A supporting plate 33 is connected across the opening 11 in the basemember 10 and to opposite sides of said base member and upon which ismounted a cylinder 34. This cylinder extends longitudinally upwardly andis disposed centrally of the main supporting structure and between thecoils 17 to 20 inclusive. A piston 35 is movable within the cylinder andis connected to the lower end of a piston rod 36 which projects beyond apacking37 and is connected to a cross head 38. Extending downwardly fromthe cross head and secured to the ends thereof are a pair of rods 39.The lower ends of.

are connected to the straps 40 at a point ad-.

jacent Where'thecurved ends merge into the straight portions of thestraps.

The upper end of the cylinder 34 1s connected by means of a pipe 42 to aneedle valve casing 43 in which is mounted a needle valve 44 operated bythe mmber 45. An operating rod 46 connected at its lower end to themember 45 extends upwardly and beyond the upper end of the topo'f thesupporting structure, where it is provided with a finger piece 47. Valvecasing 43 1s c6nnected by an elbow 48 to a stand pipe 49, the standpipehaving an enlargement 50 at its upper end and a threaded cap 51which is adapted to be moved so that the pipe may be filled with oilandthe parts associated -therewith.' A union 52 interposed in the elbow 48providesa means-for removing said elbow when desired.

A valve 53 is interposed between the vertical pipe 54, whichis locatedbelow the stand pipe 49, and a pipe 55 which connects pipe 54 with thebottom of the cylinder 34 as shown at '56. 'Valve 53 has a crank 57connected thereto for operating the same. The outer free end of thecrank, asshown at 58, is connected with'a rod 59 by means of a,pin 60adapted to be inserted within any one of a plurality of perforations 61.This rod, as shown at 62, is pivotally connected with acore 63 of asolenoid 64. the solenoid end connectedto the crank 57 and the other endto the enlargement 50 which will tend to aid in raising the crank andfor closing the valve'53 when the circu t to the solenoid has beenopened. y p

The cylinder 34 and the pipes connecting the opposite ends of thecylinder with each other, are adapted to be filled with a suflicicntquantity of oil so that the oil will be in contact with opposite sidesof the piston 35. It will be appreciated that any suitable fluid may beemployed in the fluid motor for purposes which will be presently explained.

The rod 59 is provided. with'an extension 71 having a laterallyprojecting lug 72 adapted to engage the supporting bar 22 at one side ofthe device for limiting the 11pward movement of the crank arm 57 by thespring 66 when the solenoid 64 has released j the core 63 and in whichposition the valve is held closed in order to'prcvent the flow of fluidfrom one side of the piston 35 to the opposite side. It will be notedthat the valie 53 is disposed substantiallymidway between the horizontallevels of the pi ie's42 and 55.

he spring motor67 is carried by the base member and has an arm 68extending inwardly and terminatingadjacent the cylinden 34 and has itsinner end connected b means of a rod 69 to the cross head 38'. pivotalconnection, as shown at 70, provides for the proper oscillating movementof the rods 69 during upward or downward movement of thecross head 38.The spring motor tends at all times to raise the arm 68 andtherebyelevate the cross head 38, piston and the cores 31. Referring moreparticularly toFigure 3 it will be seen that each cylinder 21 is provided with grooves 73 helic'ally arranged to receive the inner wrappingof the coili Insulating strips 74 are arranged circumferentia'lly of thecoil and in spaced relation til) and are provided with grooves 7 5 alongthe inner edge to receive the inner wrap ing of the wires, while theopposite 'longitu inal edge is provided wit-h; grooves 76 adapted toreceive the outer wrapping of the wires. It

pair of wires81 and 82 are located in spaced parallel relationandarranged alternately in each layer of the coil and any number oflayers may be employed which will be conv.sistentwich anefficient-operation of the device. Preferably, each wire" may consist ofan insulated cable having a core comprising two insulated wires, onewire of each coil being connected in series fand with one pole of thecurrent SUuL'CQ and with one terminal of the arc,'while the other wiresofcach cable are connected in series and between the other pole of thesource of current supply andthe other are terminal.

Furthermore the wrappingfof the'coil 17 on its respectivecylinder is inreverse order to the wrapping of the coil 18 so that while .it will benoted that any pair of the'coils will have oppositepolarity and themagnetic flux is thus confined entirely within the coil and testsformagnetic influence beyond the coils haveshown that no'magnetic influencecan be noticed.

Wire 82, which forms one half the turns of the coils, is connected tothe input lead 83 of an; alternating current circuit, while the ,wire 81which formsthe other half of the the circuit through the work or parentmetal 89. The hande 86,'as shown diagranunatically in Figure 5', isprovided with a switch having a push button 91, one member of the switchbeing connected to the wire 8!),

while'the othermemberof said switch is connected by means of a wire 92shown in Figure 5 and representing the electrode; 88 in Figure 1, thecircuit bei ,g completed by the lead 93 in Figures 1 ant Referring moreparticularly to the diagram in Figure 5, it will be seen that the wires81 and 82 are'wound in parallel relation in each of the coils but inopposite direction to an adjacent coil so that during the pulsations ofthe alternating current the cur rent will flow in opposite directionsthrough] exactly the same path and through the same. length of wiresetting upv a magnetic. flux in the coils and through which the cores 31are moved to control the reactance.

The operationof my device is as follows:

Theleads 80 and -81 are connected to an alternating current supply asshown in Figure 5 whereby the pulsations will travel along wire 82 andreturn in the opposite direction over wire 81 as soon as an arc has beenstruck between the electrodes 88 and the parent metal 89. Thevoltage atthis time may be anywhere from 75 to 90, but the voltage readily dropsacross the are due to the control by means of the reactance includingthe coils-and the movable cores 31, A

few seconds after the arc has been struck the temperature of the parentmetal or .Work

, 35 may be moved in any direction desired,

and whereby the fluid from the top of the.

piston may be forced through the'pipes 42, 43, 54 and 55 to the bottomof the cylinder and below the piston 35. At thistime the cores 31 aremagnetically withdrawn within the coils and the spring motor 67 tends toraise'the arm 68 and assists in elevating the cores 31 thereby reducingthe amperage across the arc and thus lessening the heat.

It will be appreciated that as long as the arc struck the cores 31 willbe magnetically impelled into the coils so that when the ,valve' 53 isreleased to permit the flow of the oil, the spring motor and magneticimpulsion will raise the cores. If the tempera ture, at any time of thearc is decreased which is not satisfactory for welding purposes, thearcmay be broken and the push button operated to close the switch 90, againsetting the solenoid 64 into operation, whereby the rod' 59 will bedepressed, operating the crank 57 and again opening the valve 53.

At this time the magnetic influence on the cores has been eliminated andtherefore the cores will tend to drop by their own weight against theaction of the motor 67. ton 35 moving downwardly will force the fluidfrom the bottom of the cylinder 34 outwardly through the pipingsy'stemthrough the pipe 42 into the top of the cylinder and at the otherside of the piston 35. It is only necessary for thewelder to release thebutton 91 for opening the switch to stop the downward or upward movementof'the cores 41 and by which action it is possible for the operator toposition the core at any point desired for controlling at will theamperage and likewise the degree of heat at the arc.

Sometimes conditions are' met with in Which 'a substantially uniformcrack is found in the parent metal which may be welded by i a gradualand uniform decrease in the temperature of the arc. At such a time theneedle valve-4A may be operated through the finger piece 47 forrestricting the flow of the fluid through. the piping and to' opposite Isides of the cylinder 34 so that when the switch 90 is closed and thearc has been struck the core will be moved at a predetermined speed intothe colls. The tuning of the descent of: the cores 31 by gravlty 1s.gree as established by the The pis-.

also controlled by the manipulation of the through the windings of thereactance coil. The'resultant current flowing out of-the reactance coiland across the welding arc has all the characteristics of directcurrent, havinglost the pulsating surges, so characteristic ofalternating current.

It will thus be seen that I have provided-a simple, efficient anddurable d'evice which can be automatically operated to sensitivelyadjust the degree to which a reactance coil, by reason of itsinductance, can affect the volt age and energy or heat supplid across a.welding are. The voltage may be anywhere from to 90 volts when the arcis struck. Immediately thereafter the voltage drops to the operatorholds the electrode to the work or parent metal, the lower the voltagewill remain, and if the operator lengthens his approximately 16 to 18volts andthe closer other Words, the heat or energy across the weldingarc will remain at the desired deposition of the cores in the reactancecoils. Q

While I have shown and described an arc welding machine in which thecurrent flowing across the arcterminals, and therefore the temperatureof the arc, is sensitively controlled,- it will. be appreciated'that thedevice may be employed under any condition where an arc is necessary,and more particularly where an arc is in circuit with v an alternatingcurrent. v -The flux does not travel over the rods 3;}

because the bars 32 which connect pairs of the poles afford the path ofleast-resistance and also because of the fact'that each coil has thesame number of turns, the 'wire 81 supplying half the turns .while thewire 82 forms the other half of the turns of the coil. The wires 81 and82 are continuous" so that a pair ofsingle wires, complete all the turnsof the coils.

While I have shown the coils in cores 10- v cated more conveniently inavertical posi 1 tion it will be appreciated that said 'coils zontal andvertical for effective operation. The vertical disposition ofv thecoils, howmay assume any position between theshoriever, provide for abetter circulation of the air through the wires and more convenientmeans for direct operation of the cores through the force of gravitywithoutlnecessitating additional mechanism for causing a downwardmovement'of the cores.

The machine has a wide range and is capable of employing any sizeelectrode from the smallest to the largest without requiring 1 additionsor variations in the structure thereof.

What I claim is: V s

1. In an alternating current electric are forming circuit including asource of alternating current supply, a reactance disposed 1 betweeneach'terminal ot the arc and the poles of the alternating current,supply,

and means adapted to be controlled at will i and remotely from the coilsfor regulating the voltage and amperage across the are.

In an alternating current electric are forming circuit including asource of alternating current supply, a reactance disposed between eachterminal of the arc and the polesof the alternating current supply,

means adapted to be controlled at will and remotely from the coils forregulating the voltage and amperage across the 'arc,'and means forautomatically actuating the last 39 mentioned means. I c

' 3. In an alternating-current electriciarc forming circuit including asource of alternating current supply, a reactance disposed .between eachterminal of the are and the poles of the alternating current supply,means adapted to be controlled at will and remotely from the coils forregulating thevoltage and amperage across the arc and means forautomatically actuating the last 40 mentionednneans, said last mentionedmeans including means adapted to be set in motion by" the alternatingcurrent supply.

. 4. In an alternating current electric are forming circuit including asource ofalternating current supplyja reactance disposed between. eachterminal of the arc and the poles of the alternating current supplymeans adapted to be controlled at will and remotely from the coils forregulating the voltage and amperage across the'arc, means forautomatically actuating the last men tioned means, and a timing meansfor regulating the automatic'm'eans.

' 5. In an alternatingcurrentelectric arc forming circuit including asource ofalternatingcurrent supply, a reactance disposed between eacl1terminal of the 3 1C and thepoles' of the alternating v current supply,meansadapted to be controlled at will and; remotely from thecoilsforg'egulatihg the voltage and amperage across the are, a moi ablecore for the reactance, and operating means'ior predeterminedlypositioning the core relative to, the reactance at the will of M theoperator;

ii U

means adapted to be controlled at will and remotely from the coilsforregulating the voltage and amperage across the arc, a movable eor'e forthe reactance, operating means for predeterminedly positioning the coreoperator, and means for controlling the operating means remotely fromthe rear-tance. 7. In an alternating current electric are formingcircuit including .a source of alternating current supply. a reactaucedisposed between each terminal of thearc and the relatlve to thereactance at the will of the o orator, and means for causing timing of te speed ofmovement of the core.

8. In an alternating current electric are forming circuit including asource of alternating current supply, a reactance disposed between eachterminal of the arc and the poles of the alternating current supply,means adapted to be controlled at will and rem tely from the coils forregulating the voltage and amperage across the are, a movable core forthe reactance, operating means for predeterminedly positioning the corerelative to the reactance at the will of the o erator, said operatingmeans including an e ectrical means having an open circuit connectedwith the alternating currentsupply for setting in operation saidoperating means. and means remotely located from thc reactance forclosing the open circuit. y

9. In an alternating current electric are forming circuit including asource of alternating current supply, a reactance disposed between eachterminal of the are and the poles of the alternating current supply,means adapted to be controlled at will and remotely from thecoils forregulating the" voltage and ampe 'age'across the arc, a movrelative tothe reactance at the will of the loo able core for the reactance,operating means for predeterminedly positioning the core tance forclosing the open'circuit, and means tor controlling the speed ofactuation of the operating means. v

10. In an alternating current electric arc welding machine adapted to beconnected with a source of alternating current supply,

are terminals, a reactance coil interposed between each terminal of thearc and the poles of the alternating current supply, a core movable bygravity in one direction for varying the reactance of said coil, andmeans poles of the alternating current supply, a

core movable by gravity in one direction for varying the reactance ofsaid coil, means for retaining the core in a predetermined positionrelative to the coil at the will of the operator, and means for causingsaid re-- taining means to release the core.

12. In an alternating current electric arc welding machine adapted to beconnected with a source'ot alternating current supply. are terminals, areactant-e, coil interposed between each terminal of the arc and thepoles of the alternating current supply, a core movable by gravity inone direction for varying the reactance of said coil, means forretaining the core in a predetermined position relative to the coil atthe will of the operator, means for causing saidretaining meansto'release the core, and means for restraining the retaining means whenthe core is released for varying the speed of movement of the.co1e.- a

13. In an alternating current electric arc welding machine adapted to beconnected with a source of alternating current supply, are terminals, areactance coil interposed between each terminal of the arc and the polesof the alternating currentsupply. acore movable by gravity in onedirection for varying the reactance of said coil, means for retainingthe'core in a predetermined position relative to the coil.at.the will ofthe operator, said core being constructed to be 'magnetically impelledin an opposite direction.

14. In an alternating current electric arc welding machine adapted to beconnected with asource of alternating current supply,

:arc terminals, a reactance coil interposed between each termmal'of thearc and the poles of the alternating current supply, a core movable bygravity in one direction for varying the reactance of said coil, meansfor retaining the core in a predetermined position relative to the coilat the will of the operator, said core being magnetically impelled-in anopposite direction, and means for assisting the magnetic impulsion ofsaid core.

15. In an alternating current electric arc welding machine adapted to beconnected with a source of alternating current supply,

are terminals, a reactance coil interposed between each terminal of theare and the poles of the alternating current supply, a core movable bygravity in one direction for varying the reactance of said coil, meansfor retaining the core in a predetermined position relative to the coilat the will of the operator, said core being constructed to bemagnetically impelled in an opposite direction, automatic means forresisting the force of gravity on the core and for assisting themagnetic impulsion of said core.

16. In an alternating current electric arc welding machine adapted to beconnected with a source of alternating current supply, are terminals, areactance coil interposed between each terminal of the arc and the polesof the alternating current supply, a core movable by gravity in onedirection for varying the react'ance of said coil. means for-retainingthe core in a predetermined position relative to the coil at the will ofthe operator, said core being magnetically impelled in an oppositedirection, and means for-assisting the magnetic'impulsion of said core,and releasing means for the retaining means, means for causingrestraining of the releasing means or the assisting means and themagnetic impulsion of the core for timing the speed of movement of thecore in either direction.

17. In an alternating current electric arc welding machine adapted to beconnected with a 'source of alternatin; current supply, arc terminals, areactance coil interposed between each terminal of, the arc and .thepoles of the alternating current supply, a core movable by gravity inone direction for varying the reactance of said coil, means forretainingthe core in a predetermined position-relative to the coil atthe will of the operator, said core being magnetically impelled in anopposite direction.

means for assisting the magnetic impulsion-- of said core, and means fortiming the speed 0 movement 'of the core ,in either direction.

18. In an alternatingcurrent electric arc welding machine adapted'to beconnected with a source of alternating current supply, arc terminals, areactance coil interposed between each terminal of the arc and the polesof the alternating current supply, a core movable by gravity in onedirection for varying the reactance of said coil, and a fluid motor forretaining the core in a predetermined. position relative to the coil atthe will of the operator.

1-9. In an alternating current electric arc weldingmaehine adapted to beconnected with a source of alternating current supply, are terminals, areactance coil interposed between each terminal of the are and the polesofithe alternating current supply; a core movable by gravity in onedirec tion for varying the renctance f aid coil,

' means. for maintainingthefluid insupportand a fluid motor forretaining the core in a predetermined position relative 'to the coil atthe will of. the operator, said motor including a piston connectedto-the core, and

tion for varying the reactance of said coil,

a fluid, motor for retaining the core in .a

predetermined position relative to the coils welding machine adapted tov at the will of the operator, said motor ineluding a piston connectedto the core, means for retaining the fluid in supporting rela tion withthe piston, and meansfor causing actuation of the last mentioned means,remotely from the reactance coil and adjacent the arc, to release thefluid.

21. In an alternating current electric arc welding machine adapted to beconnected with a source of" alternating current s'upply, are terminals,a reactance coil interposed between each terminal of the are and thepoles of the alternating current supply. a core movable by gravity inone direction for varying the reactance of saidcoil, a fluid motor forretaining the core in a predeterinined position relative to the coil atthe will of the operator, said motor in--- eluding a piston connected tothe core, means for maintaining the fluld 1n SUPPOIUHQ" relation withthe piston, and means forr'estrain ing the release ofthe fluid fortiming the speed of movement of the p1ston-and, core, 22. In analternating current electrlc arc avelding machine adapted to beconnected wvith a source of altern'atingwurrent supply, arc terminals,-areactance' coil interposed between each termlnal of the are'an-dthepoles of the alternating current sup- 61V 4 core movable b ravit inone direction for varying thereactance of. said coil, a fluid motorforretaining the core in a predeterminedposition relative to the coil atthe will. of the operator,,said motor including a piston connected tothe core, a

ing the opposite ends of the cylinder, a.

valve interposed in the'conduit for preventwith a source of alternatingcurrentsfip valve.

H p circuit. cyllnder'for the plston, a conduit connect tion for varyingthe reactance of said coil, a fluid motor for retaining the core in apredetermined position relative to the coll at the will of the operator,said motor incylinder for the piston, a conduit connecting the; oppositeends of the cylinder, a valve interposed in the conduit for preventingflow between the opposite ends of the piston, a second valve in thecondnlt for re-. straining the flow of the fluid through the conduit,and means, under the contr l of the operator for causing actuation .0

electric arc e connected with a source of alternating current supply,are terminals, a reactance coil interposed between each terminal of thearc and the 24. In. an alternating current [eluding a piston connectedtothe core, a,

the

poles of the alternating current supply,'a' 3 the will of the operator,said motor i'ncluding a piston connected to the core, a cylinderfoir thepiston, a conduit connecting the opposite ends of the cylinder, a valveinterposed in the conduitv or preventing flow an electrical means underthe control, of the operatorv for causingactuation of the valve. t

25. In an alternating current electric arc between the opposite ends ofthe piston, and

welding. machine adapted to be connected with a source of alternatingcurrent supply, are terminals, 'a r'eactance coil nterposed between eachterminal oi the arc and the poles of the alternating current supply, a

core movable ,by gravity in one direction i115 0 1 varying thereactanceof saidcoil, a

fluid motor for retaining the core in a predetermined position relative:to the coil at the will ofthe operator, said motor includ .iiig a pistonconnected to the core, a solenoid opera'tively connected with the ivalve,-, a

avelding. electrcde handle, a .switch in the handle, a circuit connectedto the source of' alternating current supply, said" solenoid end-switchbeing in the second mentioned W 5 1 26. n an alternating currentelectric arc welding machlneadapted to, be connected with a sourceofalternating current supply;-

fluid motor for retaining the core in av pre-' determined positionrelative to the coil -,lt

arc terminals, a reactance coil interposedply, arc terminals, are'actance' .coil interthe will of-th operatdr, said motorincludi posedbetween each terminal of the arc and ing a piston connected to the core,a valve the poles of the alternating current 1 sup-f for controlling thefluid mbtorfa solenoid ply. a core movable by gravity in one direcoperatively connected with the "valve, 'a;

V circuit.

welding electrode handle, a switch in the handle, a circuit connectedto. the source of alternating current supply, said solenoid and switchbeing in the second mentioned circuit.

22'. In an alternating current electric arc welding machine adapted tobe' connected with a source of alternating current supply, areterminals, a reactance coil interposed between each terminal of the areand the poles of the alternating current supply, a core movable bygravity in. one direction for varying the reactance of said coil, 11'fluid motor for retaining the core in a predetermined )osition relativeto the .coil at the will of the operator, said motor including a pistonconnected to the core, a valve for controlling the fluid motor, asolenoid operatively connected with the valve, a

welding electrode handle, a switch in the handle, a circuit connected tothe source of alternating current supply, said solenoid and switch beingin the second mentioned 28. In an alternating current electric weldingmachine adapted to be connected with a source of alternating currentsupply, arc terminals, :1 reactance coil interposed between eachterminal of the arc and the poles of the alternating current supply, acore movable by gravity in one direction for varying the reactance ofsaid coil, mean; for retaining the core in a predetermined positionrelatiwe to the coil at .the

will'of .the'operator, said core being "mag netically impelled'in anopposite direction, a spring motor, an arm connected with the motor andcore, said motor tending to ac tuate the arm to assist the magneticimpulsion of said core, and means for timing the speed of movement ofthe core direction.

29. In an alternating current-electric arc welding machine adapted to beconnected with a source of alternating current supin either ply, arcterminals, a reactance coil interposed between each terminal of the arcand the poles of the alternating current supply, a core movable bygravity in one direction for varying the reactance of said coil, meansfor retaining the core in a predetermined position relative to the coilat the will of the operator, said core being magnetically impelled in anopposite direction,

a spring motor, an arm connected with the motor and core, said motortending to ac tuate the arm to assist the magnetic impulslon of saidcore,

with a source of alternating, current supply, arc terminals, -areactance coil interposed between each te'rmi l of the-arc and the polesof the alternatmg current supply, a core movable by gravity in onedirection for varying the reactanee of said coil, and a fluid motor forretaining the core in a predetermined position relative to the coil atthe will of the operator, and an electrieal means under the control ofthe operator for causing the motor to release the core. I

31. In an alternating current electric arc welding machme adapted to beconnected with a source of alternating current supply, arc terminals, areactance coil interposed between each terminal of the are and the polesof the alternating current supply, a core movable by gravity in onedirection for varyingthereactauce of said coil,

welding machine adapted to be connected with a source of alternatingcurrent supply, are terminals, a reactance coil interposed between eachterminal of-the arc and the poles of the alternating current su ply,\'acore movable by gravity in one varying the reactance of. said coil, anda fluid motor for retaining the core in a predetermined positionrelative to the coil at the will of the operator, and a valve forcausing timing'ofthe fluid motor and for controlling the speed ofmovement of the core.

In an alternating current electric arc welding machine adapted to beconnected with a source of alternating current supply, are terminals, areactance coil interposed between each terminal of the arc and the polesI actuation of the core.

34. In an alternating current electric arc welding machine adapted to beconnected with a source of alternating current supply, are terminals, areactance coil interposed betweeneach terminalof the arc'and the polesof thealternating current supply, a core movable by gravity in onedirection for varying ,the reactance of said coil, and a p fluid motorfor retaining the core in a pre- 30. In an alternating current electricarc,- welding machine adapted to be connected determined ositionrelative "to the coil at the will of t e operator, a valve for causingtiming of the fluid motor andfor controlling the speed of movement ofthe core, a valve for releasing the fluid motor to permit actuation ofthe core, andmeans for causing actuation of the second mentioned valveand irection for adapted to be controlled remotely from the coil. I I

35. 'In an alternatin current electric arc welding machine adapted to beconnected with a source of alternating current supply, arc terminals, areactance coil interposed between each terminal of the arc and the polesof the alternating current supply, a core are terminals, a reactancecoil interposed between each terminal of the arc and the poles of thealternating current supply, a core movable by gravity in one directionfor varying the reactance of said coils,.and

- means for retaining the core in a predetermined position relative tothe coils at the will of the operator, said coils being connected inseries, said coils being so arranged that each adjacent pair of coilshaveopposite polarity.

37. In an alternating current electritharc welding machine adapted to beconnected with a source of alternating current supply, are terminals, areactance coil interposed between each terminal of the arc and the polesof the alternating current supply, a core movable by gravity in onedirection I for varying the reactance of said coils, landmeans forretaining the core in a. predeter-. mined position relative to the coi sat the will of the operator, said coils being connected in series,onecoil being reversely wound to that of an adjacent coil.

38. In an alternating current electric arc welding machine adapted. tobe connected with a source of alternating current supply, are terminals,a reactance coil interposed between each terminal of the arcs and thepoles of the alternating current supply, a core movable by gravity inone direction for varying the reactancc of said coils, and means forretaining the core in a predetermined position relative to the coils atthe will of the operator, said coils being connected in series, saidcoils being formed of a pair of wires wound side by side.

39. .In an alternating current electric arc welding machine adapted tobe connected with a source of alternating current supply, are terminals,a rcactance coil interposed between each terminal of the arc and thepoles of the alternating current supply, a'core movable by gravity inone direction for varying thereactance of said coils, and means forretaining the core in a predetermined position relative to the coils atthe will of the operator, said coils being connected in series, thewires of the'coils being spaced from each other.

40. In an alternating current electric arc welding machine adapted to beconnected with a source ofalternating current supply, are terminals, areactance coil interposed between each terminal of the arc and the polesof the alternating current su ply, a core movable by gravity in onedirection for varying the reactance of said coils, and, means forretaining the core in a predetermined position relative'to the coils atthe will of the operator, said coils being conpair of wires wound sideby side, each wire having an end connected to an arc terminal, the otherend of each wire being connected to a, poleot' the alternating currentsupply.

41. In an alternating current electric arc welding machine adapted to beconnected with a. source of alternating current supply,

are terminals, reactance coils comprising a pair of continuous wiresWound side by slde, the terminals of one wire being connected to a poleof the source of current supply, the opposite terminal of the other Wireconnected to the remaining pole of the source of the; current supply,and the remaining terminals of the wires being connected to the arcterminals of said circuit.

42. In an alternating current electric are welding machine adapted to beconnected with a source of alternating current supply, are terminalsreactance coils comprising a pair of continuous wires wound side byside, the terminals of one wire being connected to a. pole of the sourceof current supply, the opposite terminal of the other wire connected tothe remaining pole of the source of the current supply, and theremaining terminals of the wires being connected to the arc terminals ofsaid circuit, said coils being so arranged'that each adjacent pair ofcoils have opposite polarity. 43. In an alternating current electric arcwelding machine adapted to be connected with a source of alternatingcurrent supply, are terminals, reactancecoils arranged ,vertically andcomprising a pair of continuous wires wound side by side, the terminalsof one wire being connected to a, pole of the source of current supply,the opposite terminal of the other wire connected to the remaining poleof the course of the current supply, and the remaining terminals of thewires being connected to the arc terminals of said circuit, the pair ofwires 'on one coil being oppositely wound to that of an adjacent coil.

4-1. In an alternating current electric arc welding machine adapted tobe connected with a source of alternating current supply, a reterminals, reactance coils arranged vertically and comprising a pair ofcontinuous wires wound side by side, the terminals of -nected in series,said coils being formed of a one wire being connected toa pole of thesource of current supply, the opposite terminal of the other wireconnected to the remaining pole of the source of the current supply, andthe remaining terminals of the wires being connected to the arcterminals of said circuit, each coil having the same number of turns.

45. In an alternating current electric are welding machine adapted to beconnected with a source of alternating current supply, arc terminals,reactance coils arranged vertically and comprising a pair of continuouswires wound side by side, the terminals of one wire being connected toa'poleof the source ofcurrent supply, the opposite terminal of the otherwire connected to the remaining pole of the source of the currentsupply,and the remaining terminals of the Wires being connected to the arcterminals of welding machine adapted to be connected with a source ofalternating current supply, arc terminals, reactance coils arrangedvertically and comprising a pair of continuous wires wound side by side,the terminals of one wire being connected to a pole of the source ofcurrent supply, the opposite terminal of the other wire connected to there- /maining pole of the source of the current supply, and the remainingterminals of the wires being connected to the arc terminals of saidcircuit, a core for each coil, and

means for bridging a pair of the cores.

47. In an alternating current electric arc welding machine adapted. tobe connected with a source of alternating current'supply,

arc terminals, reactance coils arranged verticallyand comprising a pairofcontmuous wires wouIid' side by side, the terminals of one wire beingconnected to a pole of the source of current supply, the oppositeterminal of the other wire connected to the remaining pole of the sourceof the currentsupply. and the remainingterminals of the wires beingconnected to the are terminals of said circuit, a core for each coil,said cores being movable downwardly by gravity.

48. In an alternating current electric arc welding machine adapted to beconnected with a source of alternating current supply, arc terminals,reactance coils arranged vertically and comprising a pair of continuousWire's wound side by side, the terminals of one wire being connected toa pole of the source of current supply, the opposite terminalof theother'wire connected to the remaining pole of the source of the currentsupply, and the remaining terminals of the wires being connected to thearcterminals of said, circuit, a core for each coil, said cores beingmovable downwardly by gravity, the

cores being adapted to be magnetically impelled in the oppositedirection.

49. In an alternating current electric arc welding machine adapted to beconnected with a-source of alternating current supply, are terminals,reactancc coils arranged vertically and comprising a pair of continuouswires wound side by side, the terminals of one wire being connected toa' pole of the source of current supply, the opposite terminal of theother wire connected to the remaining pole of the source of the currentsupply, and the remaining terminals of the wires being connected to the.arc terminals of said circuit, a core for each coil, said cores bingmovable downwardly by gravity. the

.coresibein adapted to be magnetically impelled in t 1c oppositedirection, and means for assisting the magnetic impulsiou of the cores.

In testimony whereof I aflix my signa ture.

GROVER C. HUBBLE.

